egr connector

:banghead: I have a 87 camaro 305 tpi.Just put new cam in and after puting everything back together I have two connectors that i do not know where they plug in. The first is the egr valve cn it comes from under the plenum. The second is a connector behind the rear valve cover its a two pin cn that seems to come out of the wiring harness. I put a new throttle body on also and the car will stall out when maf sensor is plugged in. Not sure if cn not being plugged in is causing car to stall.